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What is the working principle of Minera SGrid ODT Transformer?

The Minera SGrid ODT transformer is a self regulating transformer where this is realized with the help of a so called "booster" that is actually a miniature of the traditional active part and is placed in the same tank just beside the larger one. The regulation is being done through this booster on its secondary winding which is operated by a Tap Changer Control Box where some series of contactors inside are responsible for this function. The Tap Changer Control Box is managed by the Voltage Regulation Box that basically consist of a PLC (Modicon M340), a Power Meter and an HMI (touch screen) electronic device. In an harmony, the SGrid transformer reads the needs coming from the load/network and positions itself in a very fast way to supply at a predefined voltage level.